RESUMO
Elucidating the effects of domesticated organisms escaping into the natural environment represents a topic of importance in both evolutionary and conservation biology. However, when excluding the abundant data on salmonids, there is a lack of knowledge on this topic for marine fish aquaculture, which continues to expand globally. In order to bridge this empirical gap, we investigated a suspected escape of sexually mature domesticated Atlantic cod from a commercial marine fish farm in northern Norway. This involved genotyping samples of fish from cages on the farm, putatively identified escapees and wild cod captured in the region and samples of recently spawned eggs collected in the sea. Genetic analyses confirmed a farmed ancestry of the suspected escapees, and significantly, 27% of the sampled cod eggs. Furthermore, statistical analyses revealed a strong reduction in genetic variation in all samples of the farmed cod, including low effective population size and high degree of siblingship. These results thus document the escape of sexually mature adult cod and the release of fertilized domesticated cod eggs into the natural environment. Although it is possible that some of the mature escapees spawned post-escape, the fact that only a single egg of potential hybrid farmed × wild origin was identified, together with the high number of mature cod in the farm, points to within cage spawning as the primary source of these eggs. This suggestion is supported by oceanic particle-drift modelling, verifying that transport of eggs between the farm and the egg sampling locations was plausible. This study represents a rare documentation of interaction between domesticated and wild populations for a marine fish, pointing towards potential impacts on the local wild population.
RESUMO
BACKGROUND: About 50% of the 65,000 elderly with dementia in Norway live in their own homes, and are cared for by their families and social and health care personnel in the municipalities. According to governmental documents, the provision of help to demented patients should be predictable, continuous, individually tailored, and carried out by few helpers. The purpose of this study was to examine public social and health services provided to demented patients living at home. MATERIAL AND METHODS: Provision of public care to 460 patients from 24 municipalities, was recorded for seven consecutive days. The average patient age was 82 years (SD 7.1), 74% were women. Degree of dementia was assessed with the Clinical Dementia Rating scale (CDR). Functional status and need of help was assessed with the Rapid Disability Rating Scale-2 (RDRS 2). RESULTS AND INTERPRETATION: . Of the 460 patients, 54% had received a diagnosis by a physician. On average, 8 (SD 4) different people helped for 5.4 ( SD: 6.3) hours a week. Help was most frequently given to; take medicines, prepare food, carry out personal Activity of Daily Living (ADL) and to clean the house. Some did not receive enough help and a few received too much. Patients with a dementia diagnosis did not receive more help than those without. The results indicate that Norwegian municipalities provide a substantial amount of health services, but fail to tailor plans according to individual needs.